How to open calibration software

The linked image is showing some software being used to calibrate the magnetometer, accelerometers and gyroscopes. I have downloaded the Multiwii 1.8 software, but can't get it to run. When I try to open the Application called MultiWiiConf1_8 I get an error that reads "Windows cannot find 'javaw.exe'." Can anyone help me?

Comments

Ok, I've installed Arduino. I'm still getting the same error. Do I need to put the MultiWiiConf file somewhere in the Arduino folder? I've tried many things, and the configuration software still won't start.